During a crash test, an air bag inflates to stop a dummy’s forward motion. the dummy’s mass is 75kg. if the net force on the dummy is 825 n toward the rear of the car, what is the dummy’s acceleration?

Mass of the dummy m = 75 kg

Net Force on the dummy since it is given that the force is towards the backside of the car.

Acceleration of the dummy a = ?

Using Newton's 2nd law of motion, we have

-825 = (75)a

Hence,

Acceleration of the dummy is -11

The negative sign indicates that the dummy is slowing at a rate of 11

glass has been rated on the mohs scale as 5.5